#-------------------------------------------------------------
#
# (C) Copyright IBM Corp. 2010, 2015
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
#-------------------------------------------------------------


args <- commandArgs(TRUE)
options(digits=22)
library("Matrix")

A = read.table(args[1], sep=",");
B = matrix(0, nrow=nrow(A), ncol=ncol(A));

cols = ncol(A);
A1 = A[, 1:cols/2];
A2 = A[,(cols/2+1):cols]
B[, 1:cols/2] = scale(A1, center=T, scale=F)
B[, (cols/2+1):cols] = scale(A2)

write.table(B, args[2], sep=",", row.names = F, col.names=F)
